CN1748426B - Method to transmit and receive font information in streaming systems - Google Patents

Method to transmit and receive font information in streaming systems Download PDF

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Publication number
CN1748426B
CN1748426B CN2004800037250A CN200480003725A CN1748426B CN 1748426 B CN1748426 B CN 1748426B CN 2004800037250 A CN2004800037250 A CN 2004800037250A CN 200480003725 A CN200480003725 A CN 200480003725A CN 1748426 B CN1748426 B CN 1748426B
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China
Prior art keywords
font
font information
stream
information
symbol
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Chinese (zh)
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CN1748426A (en
Inventor
达维德·萨于克
蒂埃里·维耶拉尔
保罗·凯尔比里乌
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InterDigital VC Holdings Inc
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Thomson Licensing SAS
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F40/00—Handling natural language data
    • G06F40/10—Text processing
    • G06F40/103—Formatting, i.e. changing of presentation of documents
    • G06F40/109—Font handling; Temporal or kinetic typography
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/222—Control of the character-code memory
    • G09G5/225—Control of the character-code memory comprising a loadable character generator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23412—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs for generating or manipulating the scene composition of objects, e.g. MPEG-4 objects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234318—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into objects, e.g. MPEG-4 objects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/44012—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving rendering scenes according to scene graphs, e.g. MPEG-4 scene graphs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47205—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for manipulating displayed content, e.g. interacting with MPEG-4 objects, editing locally

Abstract

A method is disclosed that allows a content provider to transmit font information (1) to a receiver, and that further allows a receiver terminal (5) to receive and apply such information, thus giving improved possibilities for the content provider to define how to render the transmitted text or symbols on a display (13). The method is good for data streaming systems, in particular MPEG-4 based systems. Advantageously, the received font information can be stored if the terminal contains an appropriate storage device (12).

Description

In streaming system, send and receive the method for font information
Technical field
The present invention relates to be used to comprise the font information of the electronic equipment of display, particularly, relate to a kind of method that is used to send, receive and upgrade said font information.
Background technology
In MPEG-4 standard ISO/IEC 14496; Particularly, in part 1 system, can come combined audio/video (AV) scene according to a plurality of audio frequency, video and Synthetic 2 D/3D object; Can utilize the different MPEG-4 format encoded types said a plurality of object of encoding; And can it be sent as the two-value packed data in the multiplexed bit stream, said multiplexed bit stream comprises audio frequency, video and other son stream, the text that for example will show etc.Son stream also is known as basic stream, and (Elementary Stream ES), and can visit through descriptor.Usually scene is interpreted as the audio-video space that the user can be mutual.
To be called combination according to forming the processing that object synthesize single scene, and this means in the reconstruction of dividing into groups and after the separation of ES is decoded separately, mix a plurality of independently AV objects, for example, the appearing of the video relevant with audio frequency and text.When confirming, can use user interactions, terminal capability and terminal configuration how at the receiving side terminal combine scenes.The bit stream that in said MPEG-4 standard, defines comprises the ES that is known as " scene description stream ", as the universal command that is used for the scene combination, also comprises other son stream, and the so-called object factory stream that comprises configuration information is that decoding AV stream is necessary.The recipient, extract configuration stream and use it for the required AV decoder of establishment.Then, with respect to decode independently AV stream of object, and the combined command that is received is used for preparing single appearing according to the AV object of decoding.Then, this finally appears playback or scene because the terminal correlation combiner, said finally appear or scene not under the control fully of broadcaster or content supplier.
In ISO/IEC 14496-1:2002, the hierarchy model that utilizes parametric method to present the AV scene has been described as the current version of MPEG-4 system standard.InitialObjectDescriptor (IOD) comprises the descriptor that is used for scene description stream and special-purpose OD stream.Scene description stream comprises the scene description that the code tree by node constitutes." node " refers to the treatment step or the unit that in Moving Picture Experts Group-2, use, for example, carries out the interface of the time synchronized between decoder and the subsequent treatment unit.Node can have the attribute of the field of being known as, and additional other information.Through pointing to the OD in the OD stream, the leaf node on this tree is corresponding with basic AV data, or corresponding with for example square, curve or text figures 2D/3D synthetic object, and said OD stream comprises the ES descriptor that points to AV data among the ES conversely.Intermediate node or scene description nodes are divided into groups forming the AV object to this material, and this AV object are carried out for example divide into groups and change.
The text that shows is comprised among the scene description ES.Utilize the FontStyle node to come the reproduction of explanatory text.In FontStyle node semanteme, the family field allows creator of content to select the terminal to be used to show or reproduce the font of text.If font is available on client platform, uses it for and reproduce given text string.Otherwise, have to use default font.Opposite with a plurality of other nodes of scene description, FontStyle node field is static, that is, can not make amendment to it through upgrading.
Summary of the invention
In various application programs, content supplier hopes to confirm to show the recipient style or the font of the text that is sent.But because it lacks corresponding informance, the recipient can only show few fonts and style usually.The invention solves this problem.In addition, a kind of equipment that utilizes the inventive method in transmit leg or recipient's side is also disclosed respectively.
Having advised a kind of system that can make font information flow to the terminal, can download message and utilizes said information how to confirm videotex in said terminal.Font information is represented normally one or more symbols of character set; Can also be Printing Marks or dingbat (dingbat); And can comprise and be used for for example printed words or shape, size, color, runic and italic style, line-spacing, the explanation of proportional spacing or constant spacing.Font can be used for all texts, maybe can be linked to the certain text content that needs this information, so that on equipment, reproduce.
System of the present invention comprises: the formatted data that is used for one or more fonts; Be used for data are merged into the device of bit stream, for example, said bit stream is made up of the multiplexed grouping of time mark; Be used to send, transmit and receive the device of said bit stream; Said bit stream is accepted as input in the terminal, and comprises the device that is used to manage the content that font and other guide data and combination managed like decoder etc.; And reproducer, be used to appear said combined arrangement.
Description of drawings
With reference to accompanying drawing exemplary embodiments of the present invention is described, wherein:
Fig. 1 is a typical general font stream system framework;
Fig. 2 is the universal architecture at MPEG-4 terminal; And
Fig. 3 is the MPEG-4 Object Descriptor framework that comprises font stream.
Embodiment
Fig. 1 shows the assembly according to general font streaming system of the present invention.In the suitable equipment 3 that comprises like multiplexer and transmission server etc., be bit stream 4 with AV and contextual data 2 (contextual data comprises text) packing (for example multiplexed) with character font data 1.Transmission can comprise broadcasting, for example, can bit stream 4 and sub-flow structure thereof be turned to multiplexed grouping.
At receiving equipment 5 places, bit stream is decomposed into ES and OD streams such as for example control, audio frequency, video and font stream, wherein control ES and comprise the scene description that comprises text, and said ES is distributed to relevant manager.Each addressable part of ES is called addressed location (AU) 6, then, it is decoded as relevant appeared in the form of platform by decoder manager 7.Specific decoding for ES needs utilizes decoder customizing messages 11 (DSI) to create decoder manager 7.For example, be utilized in the information that receives in the control stream of bit stream, can create or revise said DSI11.Decoder manager 7 produces the assembled unit (CU) 8 that is imported into combiner 9, and combiner 9 produces conversely and is used for the for example input signal 10 of reproducer such as PC or TV 13.Owing to before combiner 9 needs, produce CU, can it be buffered in the combined buffers.In data is under the situation of the present invention of character font data, and advantageously, store fonts data in the local memory device 12 of for example memory, flash memory, dish or hard disk are so that use subsequently.For example, when content supplier's appointment will be used for the font of particular text, can character font data be used for the combination of combiner 9.Because it is relevant that combiner 9 is platforms, irrelevant with streaming system, decoder manager 7 can produce the CU form that combiner 9 needs so that as the hope of institute of content supplier the reproduction text.
MPEG-4 system standard has defined administrative time can be relevant with the AU 6 that decoder manager 7 is used, as the time of decoded data.Send to combined buffers with so being converted into CU 8 and preparing the data that are used for combiner 9.For CU, have the assembly time, defined combiner 9 and be used to determine when CU is used to reproduce content.The server 3 that sends packets to client computer must guarantee to divide into groups enough to arrive client terminal 5 soon, so that information can be in time available for combiner 9.When content creating, carry out this issue.
For the present invention being used for MPEG-4 or similar situation towards streaming system, Fig. 2 shows terminal structure.Terminal 20 comprises the interface 21 that is known as the DMIF application programming interfaces.Use it for the flow data packet format conversion between layer, sync SL and the transport layer DL.In addition, it is decomposed into son stream or ES with bit stream.The son stream and the text that will comprise contextual data send to suitable decoding buffer 22,26 together, then, at the appointed time send to decoder 23,27.Each decoder is used for the ES of particular type, and has only when needs and just create.Before using decoder, can through dedicated management device 29 receive as among the special-purpose ES such as OD stream, specified the information of decoder.Decoder output is offered combined buffers 24,28, offer combiner 25 at the special time place then, that is, and at its assembly time place separately.In present embodiment of the present invention, have the decoding buffer 26, decoder 27 and the combined buffers 28 that are used for downloaded fonts information.
In one embodiment of the invention, the character font data that is received is stored in the recipient, so that use subsequently, and in another embodiment, only stores last received font, and, must download other fonts whenever content need be used at that time.In the 3rd embodiment, the font that storage is downloaded is broken off content up to client computer.In the 4th embodiment, whether bit stream can comprise should the store fonts notification of information.In the fifth embodiment of the present invention, the download that the user can the control word volume data promptly, enables or forbids.
Fig. 3 shows the Object Descriptor framework of the MPEG-4 system that also comprises character font data.It comprises initial object descriptor and five basic streams (ES).The initial object descriptor comprises two basic flow descriptors (ES_D) of pointing to ES, especially, and ES_D SHas numerical value ES_ID S, and therefore point to scene description stream, ES_D OHas numerical value ES_ID O, and so point at objects descriptor-stream.Scene description stream comprises the scene description of how much of having described scene, animation and interactivity, and through specifying how to obtain object from ES, is linked to each object of the scene that will reproduce.The leaf node that is linked to the scene description classification tree of media object has used the object descriptor identifier (ODID) of pointing to the Object Descriptor that in Object Descriptor stream, receives.An object descriptor identifier ODID VPoint to Object Descriptor OD to visual object V, and another object descriptor identifier ODID TPoint to Object Descriptor OD to text object TEach Object Descriptor comprises the one or more ES descriptor ES_D with reference to the ES that will in scene, reproduce.Text object is included in the scene description stream that comprises the actual text node, and relates to ES,, comprises the font stream of each font that is.Through having each identifier ES_ID SAnd ES_ID FThe ES descriptor ES_D of numerical value SAnd ES_D FWith reference to two streams.
For example, when in content of multimedia during, with reference to being ES_ID as shown in Figure 3 or as the font name of string value with reference to font.Before will be inserted in the MPEG-4 stream with reference to the corresponding character font data of font and corresponding ES_ID and optional additional title string, as ES, advantageously, can the store fonts data, title and relevant information so that use subsequently.In this case, for example, title can be with reference to font.Advantageously, do not transmit (stream) filename, therefore can be used for storage by the compatible filename of selective system.
The special cell that is known as the script management device at recipient place can be handled said font relevant issues, for example, has stored specific required font before choice criteria font, the inspection whether, receives new font, has upgraded the font of being stored etc.
For example, DSI and be used for this specific font relevant information that decoder creates and comprise as stated:
-font type, that is, the internal form of different character font datas for example, can be TrueType font, OpenType font or compressed font (zipped font) etc.;
-font stored information, whether should store fonts, so that use subsequently if having specified;
-font name, that is, and be as the string of font reference; And
-be used for the system-specific information of script management device, for example, whether only use said font to specific character or symbol, or, for example only use said font to capitalization.
In the MPEG-4 system, in OD stream, transmit DSI.According to the present invention, have two kinds of possibilities of the information of sending the specific font decoder: whole said packets of information are contained among the DSI, and font AU comprises raw font data, or DSI comprises said information and is in the indication among the AU with raw font data.Can encode according to font format variable among the DSI and use in two solutions which indication.
Utilize first solution, the setting that is used for the font decoder is self-centered (self-sufficient), that is, in the OD structure, define fully, and therefore, all AU that comprise font information divide into groups to have the identical inner form by the definition of font format numerical value.This means the form that dynamically to revise the font that receives, that is, be used for the font that text reproduces, but then, only need the decoder of simple types.
For second solution, only used font format variable from DSI, ignored other font related information among the DSI.On the contrary, this packets of information is contained in the AU that is used for font information divides into groups, and can be from for example extracting the packet header.This is called self-contained font.In this case, it is just enough to be used for the specific reserved value of font format of DSI.This solution means that font stream AU divides into groups to have different internal forms, and therefore, owing to must from divide into groups, extract some its DSI that need, decoder must be more complicated than first solution.But advantageously,, can carry out dynamic font and revise owing to can use the font of new reception immediately.
Realize for MPEG-4 of the present invention, be described below, only need standard is seldom improved.Said improvement refers to that stream type, AU form, decoder type and node are semantic.
Owing to used the ES of newtype, must define the new value of streamType parameter, use said new value by the terminal, so that son stream is identified as font ES, creates required decoder and is connected to ES.Based on above-mentioned standard, can add the new streamType of suggestion as follows:
The streamType value Stream type is described
0×00 Forbid
0×01 ObjectDescriptorStream
0×02 ClockReferenceStream
0×03 SceneDescript?ionStream
0×04 VisualStream
0×05 AudioStream
0×06 MPEG7Stream
0×07 IPMPStream
0×08 ObjectContent?InfoStream
0×09 MPEGJStream
0×0A Interaction?Stream
0×0B FontStream
0×0C-0×1F Use and keep to ISO
0×20-0×3F The user is privately owned
Table 1
These streams do not need the object type indication, therefore can use numerical value 0 * FF (no object type is specified).A kind of plain mode of transmission font information is font file is embedded among the AU, creates new AU type thus.Of the MPEG-4 standard, during flow transmission, can this AU be divided into layer, sync (SL) and divide into groups.In addition, must define new decoder and manage font AU.Decoder utilizes DS I configuration from AU, to extract character font data.For example, if DSI is embodied as the class in object oriented language, then it has following form:
Class?Font_DecoderConfig?extends?DecoderSpecificInfo：
bit(8)tag＝DecSpecificInfoTag{
bit(7)fontFormat；
if(fontFormat！＝0×00){
bit(1)storeFont；
bit(8)fontNameLength；
bit(8)fontName[fontNameLength]；
bit(8)fontSpecInfo[sizeOfInstance-fontNameLength-1]；
}
}
Can stipulate to be included in the font format variable among the DSI as follows:
Font format The AU content The decoder behavior
?0×00 Self-contained font Use 1AU as self-contained font
?0×01 TrueType font (TTF) Use 1AU as TrueType font
?0×02 Font(FON) Use 1AU as Font
?0×03 Compression TTF Utilize ZIP algorithm decompress(ion) 1AU, then it is used as TTF
?0×04 Compression FON Utilize ZIP algorithm decompress(ion) 1AU, then it is used as FON
?0×05-0×7F The user is privately owned Privately owned font format
Table 2
The meaning of its dependent variable that more than uses is:
Whether storeFont-has defined store fonts, so that use subsequently,
FontNameLength-has indicated the length of fontName field,
FontName-has indicated the title of font, and
FontSpecInfo-has the opaque containers to the information of specific font processor.
For the font format variable with numerical value 0 * 01 to 0 * 04, decoder needs all DSI information to come deal with data, and for the font format variable with numerical value 0 * 00, decoder can obtain its information that needs in AU.Explanation is according to exemplary font AU form of the present invention below.
If the terminal can store fonts; Can the storeFont sign be used to determine whether to store the font that is received; And through utilizing the title that receives in the fontName field is associated with file or selects significant filename, the title that receives in the fontName field is appended on the character font data.The fontSpecInfo field can be defaulted as sky, and can be used for the privately owned realization of any user by the font format indication with numerical value 0 * 05 to 0 * 07.Be self-contained font and AU be embodied as under the situation of the class in the object oriented language for example that in the AU content each font AU can comprise following data structure:
Class?FontAccessUnit(){
bit(7)fontFormat；
bit(1)storeFont；
bit(8)fontNameLength；
bit(8)fontName[fontNameLength]；
bit(8)fontSpecInfoLength；
bit(8)fontSpecInfo[fontSpecInfoLength]；
bit(8)fontData[sizeOfInstance - fontNameLength -
fontSpecInfoLength-2]
}
FontSpecInfoLength has defined the length of fontSpecInfo field, fontData
It is raw font data.Other fields have with DSI in identical meaning.
At last, the FontStyle node semanteme of in standard, describing needs to revise, so that can realize font stream.Corresponding paragraph is with reference to VRML97 standard (ISO/IEC 14772-1:1998).
Add following behavior to node:
" the family field also comprises the ObjectDescriptorIdentifier (ODID) with reference to ' FontStream ' type stream, and said stream comprises font information ".
For the best-of-breed functionality of node, of VRML97, a SFString numerical value of Family field should comprise font name.Second value should comprise the ODID that points to the stream that comprises font.In the present embodiment, the terminal can check that whether Already in the font in first numerical value, named in the terminal, reuse then.Otherwise it can utilize characteristic of the present invention to handle like the described font of MPEG-4 system standard system, and with its storage.For the best script management in the client terminal, the structuring of font information statement (that is fontStyle node) should be with reference at first utilizing its title and utilizing its flow identifier ES_ID to reproduce the required font of text in the second place.Utilize the typical scene sample of font stream characteristic can comprise following fragment:
fontStyle?FontStyle{
family[“Times?New?Roman”，“ODID:104”]
size 25.0
spacing?1.25
style“BOLD”
}
In this example, the terminal should utilize and have title the font of " Times New Roman " is reproduced the text string that has to sizing, spacing and genre parameters.If this font is unavailable the recipient, the MPEG-4 terminal can be connected to the stream with ODID " 104 ", to retrieve required font information.
Can also font stream characteristic of the present invention be included in the MPEG-4 authoring tool: when the author has defined the specific font that is used for text string; Instrument inserts the type family title first of family field; Establishment comprises the new ES of font information, and will be used for the second portion of the ODID insertion family field of said ES.
Advantageously, can transmit any font format, for example, TrueType font, Basic font, OpenType font, Asian character, scalable font, symbol font etc. are as long as this font can discerned and manage to receiving terminal.
More advantageously; The present invention can be used for can the display message content and can receive all types of equipment of font information; Especially the content that comprises text or symbol; For example, TV, DVB, computer display, navigator and portable equipment, for example mobile phone, mobile computer, PDA(Personal Digital Assistant), MP3 player or other have the music reproduction device of display.
The present invention is particularly useful for all MPEG-4 streaming systems.

Claims (24)

1. method that in MPEG-4 or similar stream-oriented system, is used to send font information may further comprise the steps:
Definition is to the text that will on display, show or the font of symbol content;
The said font information that comprises that font is described is provided, and said font is described and has been defined the set of how to reproduce or showing one or more characters, one or more symbol or character and symbol;
Said font information is converted into the form that is suitable for transmission in font information stream;
In the scene description data stream that comprises text, add object descriptor identifier as the reference that font information is flowed; And
Send said font information stream and the said scene description data stream that comprises text.
2. method according to claim 1 is characterized in that, said reference is to point to Object Descriptor (OD T) object descriptor identifier (ODID T), wherein said Object Descriptor (OD T) comprise and point to the flow descriptors (ES_D that said font information flows F).
3. method according to claim 1; It is characterized in that; Font defi-nition the reproducing characteristic of character or symbol, said characteristic comprises at least one in the following project: printed words, shape, size, color, runic style, italic style, line-spacing or spacing type.
4. method according to claim 1 and 2; It is characterized in that; Send said step that said font information stream and the said scene description data that comprises text flow and comprise also and sending control information said control information has confirmed whether the recipient should store said font information.
5. method according to claim 1 is characterized in that, the data flow of separating is used to transmit different types of data, and with the data stream multiplexing of some or whole said separation to together.
6. method according to claim 1 is characterized in that said font information comprises multiple parameter, and wherein said multiple parameter comprises size, color, style or line-spacing, and printed words, shape or pitch information then can be used the recipient.
7. method according to claim 1 is characterized in that said font information is encoded, and regulation administrative time, is used to indicate the regulation that must decode to data constantly.
8. method that in MPEG-4 or similar stream-oriented system, is used for adding or revising font information at electronic equipment, said electronic equipment comprises maybe can be connected to display, said method comprising the steps of:
Receive font information stream and scene description data stream; Font information in the said font information stream comprises the font description; Said font is described and has been defined the set of how to reproduce or showing one or more characters, one or more symbol or character and symbol, and the reference that comprises text or symbolic information and font information is flowed of said scene description data stream;
Change the form of said font information, so that can use it for processing;
Before the said conversion or during or afterwards, cushion said font information; And
Reproduce said text or symbolic information to be used for showing wherein equipment or circuit are used to define how to show said character or symbol or its set from by the font information of buffering with reference to the font information flow.
9. method according to claim 8 is characterized in that, said reference is to point to Object Descriptor (OD T) object descriptor identifier (ODID T), wherein said Object Descriptor (OD T) comprise and point to the flow descriptors (ES_D that said font information flows F).
10. method according to claim 8; It is characterized in that; Font defi-nition the reproducing characteristic of character or symbol, said characteristic comprises at least one in the following project: printed words, shape, size, color, runic style, italic style, line-spacing or spacing type.
11. method according to claim 8 is characterized in that, the data flow of separating is used to transmit different types of data, and with the data stream multiplexing of some or whole said separation to together.
12. method according to claim 8 is characterized in that, said font information comprises multiple parameter, and wherein said multiple parameter comprises size, color, style or line-spacing, and printed words, shape or pitch information then can be used the recipient.
13. method according to claim 8 is characterized in that, said font information is encoded, and regulation administrative time, is used to indicate the regulation that must decode to data constantly.
14. one kind is used to send the device to the font information of electronic equipment in MPEG-4 or similar stream-oriented system, comprises:
Definition device is used to define to the text that will on display, show or the font of symbol content;
Generator is used to provide the said font information that comprises that font is described, and said font is described and defined the set of how to reproduce or showing one or more characters, one or more symbol or character and symbol;
Conversion equipment is used for converting said font information into be suitable in the transmission of font information stream form;
Adding set is used for adding the object descriptor identifier as the reference that font information is flowed to the scene description data stream that comprises text; And
Dispensing device is used to send said font information stream and the said scene description data stream that comprises text.
15. according to claim 14ly in MPEG-4 or similar stream-oriented system, be used to send device, it is characterized in that said reference is to point to Object Descriptor (OD to the font information of electronic equipment T) object descriptor identifier (ODID T), wherein said Object Descriptor (OD T) comprise and point to the flow descriptors (ES_D that said font information flows F).
16. according to claim 14ly in MPEG-4 or similar stream-oriented system, be used to send device to the font information of electronic equipment; It is characterized in that; Font defi-nition the reproducing characteristic of character or symbol, said characteristic comprises at least one in the following project: printed words, shape, size, color, runic style, italic style, line-spacing or spacing type.
17. according to claim 14ly in MPEG-4 or similar stream-oriented system, be used to send device to the font information of electronic equipment; It is characterized in that; The data flow of separating is used to transmit different types of data, and with the data stream multiplexing of some or whole said separation to together.
18. according to claim 14ly in MPEG-4 or similar stream-oriented system, be used to send device to the font information of electronic equipment; It is characterized in that; Said font information comprises multiple parameter; Wherein said multiple parameter comprises size, color, style or line-spacing, and printed words, shape or pitch information then can be used the recipient.
19. a device that in MPEG-4 or similar stream-oriented system, is used for adding or revising at electronic equipment font information comprises:
Receiving system; Be used to receive font information stream and scene description data stream; Font information in the said font information stream comprises the font description; Said font is described and has been defined the set of how to reproduce or showing one or more characters, one or more symbol or character and symbol, and the reference that comprises text or symbolic information and font information is flowed of said scene description data stream;
Conversion equipment is used for converting said font information into be suitable for handling form;
Buffer unit, before the said conversion during or afterwards, cushion said font information; And
Generator is used for how being used to from being shown that by the font information that cushions with reference to the font information flow equipment of said character or symbol or its set or circuit provide said font information to having defined.
20. the device that in MPEG-4 or similar stream-oriented system, is used for adding or revising at electronic equipment font information according to claim 19 is characterized in that, said reference is to point to Object Descriptor (OD T) object descriptor identifier (ODID T), wherein said Object Descriptor (OD T) comprise and point to the flow descriptors (ES_D that said font information flows F).
21. the device that in MPEG-4 or similar stream-oriented system, is used for adding or revising font information according to claim 19 at electronic equipment; It is characterized in that; Font defi-nition the reproducing characteristic of character or symbol, said characteristic comprises at least one in the following project: printed words, shape, size, color, runic style, italic style, line-spacing or spacing type.
22. the device that in MPEG-4 or similar stream-oriented system, is used for adding or revising font information according to claim 19 at electronic equipment; Also comprise: be used for extracting from Object Descriptor the script management device of stream font stored information, said stream font stored information has confirmed whether the recipient should store said font information; And the local memory device that is used for when storing said font information according to said stream font stored information needs.
23. the device that in MPEG-4 or similar stream-oriented system, is used for adding or revising font information according to claim 19 at electronic equipment; It is characterized in that; The data flow of separating is used to transmit different types of data, and with the data stream multiplexing of some or whole said separation to together.
24. the device that in MPEG-4 or similar stream-oriented system, is used for adding or revising font information according to claim 19 at electronic equipment; It is characterized in that; Said font information comprises multiple parameter; Wherein said multiple parameter comprises size, color, style or line-spacing, and printed words, shape or pitch information then can be used the recipient.
CN2004800037250A 2003-02-10 2004-01-28 Method to transmit and receive font information in streaming systems Expired - Lifetime CN1748426B (en)

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EP03290324A EP1445954A1 (en) 2003-02-10 2003-02-10 Method to transmit and receive font information in streaming systems
EP03290324.7 2003-02-10
PCT/EP2004/000959 WO2004071097A1 (en) 2003-02-10 2004-01-28 Method to transmit and receive font information in streaming systems

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EP1602236B1 (en) 2019-11-13
BRPI0407310B1 (en) 2022-05-24
TW200423724A (en) 2004-11-01
JP2006517368A (en) 2006-07-20
EP1602236A1 (en) 2005-12-07
JP2012029297A (en) 2012-02-09
EP1445954A1 (en) 2004-08-11
US7701458B2 (en) 2010-04-20
US20070008309A1 (en) 2007-01-11
BRPI0407310A (en) 2006-02-21
MXPA05008037A (en) 2006-05-19
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WO2004071097A1 (en) 2004-08-19
JP5118342B2 (en) 2013-01-16

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